Ariyakul, Yossiri

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Ariyakul, Yossiri
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yossiri.ar@kmitl.ac.th

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    FPGA-based odor classification system using principal component analysis
    (2018-08-13)
    Tongyoo, Titiwoot
    ;
    Ariyakul, Yossiri
    Odor classification has been increasingly applied in various applications. The types of odors can be identified by analyzing the output pattern obtained from the odor sensors with different sensitivities to the targeted odor. Therefore, the use of reconfigurable hardware offers advantage for the flexibility to work with a number of sensors with various characteristics. In this study, the FPGA was employed in the development of an odor classification system using principal component analysis (PCA). The soft processor system was developed so that the odor classification based on PCA can be performed standalone. A number of experiments in the closed system were conducted to evaluate the validity of the proposed odor classification system and its capability to identify the kinds of odors. The effectiveness to classify the odor samples was confirmed.
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    Data Modulation Technique Using Concentration of Odor Molecules
    (2018-12-26)
    Ariyakul, Yossiri
    ;
    Wisayataksin, Sumek
    This study proposed a novel data modulation technique for digital communication by using a concentration of odor molecules. The information is encapsulated in an odor with controlled concentration levels in accordance with the binary representation of the message by using an olfactory display. The released odor is then measured by an odor sensing system where it is converted into electrical form that can be demodulated into the original data by using a digital filter and decision decoder. The experiments of sending a message by mean of odor in the UART format were performed to evaluate the possibility of the proposed molecular communication approach. The results reveal that the shape of signals detected by the odor sensor is associated with the information in the message, which confirms the reliability of data communication using this method.
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    Improvement of miniaturized olfactory display using electroosmotic pumps and SAW device
    (2015-01-26)
    Ariyakul, Yossiri
    ;
    Nakamoto, Takamichi
    Recently, the study of using olfactory displays to release scents in virtual environment have been expanded. Our group have developed an olfactory display using electroosmotic (EO) pumps and a surface acoustic device (SAW) device. In this study, the improved olfactory display is described. The number of odor components was increased from 6 in the previous work to 8 whereas the size was further miniaturized so that it can be equipped on a headset. A visual-olfactory display system was also developed using the proposed olfactory display. The system can release scents in accordance with contents in the movie on Windows Media Player platform run on a PC. An experiment based on sensory test was performed to evaluate the capability to release scents of low volatile odorants within a short time and without odor remaining after the presentation.
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    Development of a Low-cost Explosive Vapor Detector Using Metal Oxide Gas Sensors
    (2018-08-21)
    Ratchapakorn, Natchanon
    ;
    Ariyakul, Yossiri
    This paper reports on the development of a low-cost electronics nose for explosive detection. The device is composed of an array of metal oxide gas sensors installed in a 3D printer-made sensor cell. The processor and control circuit were implemented on an FPGA. The proposed device is compact, low power, and low cost. Even though, the concentration of the vapors of explosive materials are at sub-part-per million, the capabilities to sense and identify eight explosive materials; trinitrotoluene (TNT), pentaerythritol tetranitrate (PETN), cyclotrimethylenetrinitramine (RDX), ammonium nitrate, urea powder, dynamite, black powder, and double-base propellant in an open-air environment were confirmed. The reproducibility of the proposed device was also verified.
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    Development of Olfactory display using solenoid valves controlled atomization for high concentration scent emission
    (2017-01-01)
    Ariyakul, Yossiri
    This paper reports on the introduction of using atomization technique controlled by high-speed switching solenoid valves to present smells. Even though atomization has been widely used to release smells in commercial aroma diffusers, intensity of the released odor cannot be controlled. In this paper, the high speed ON/OFF switching of the solenoid valves enables the capability to control odor intensity precisely and rapidly and the atomization enables emission of high concentration odors compared with odors generated from natural evaporation method. The proposed olfactory display was evaluated by using an odor sensing system composed of a quartz crystal microbalance (QCM) gas sensor. As a result, the reproducibility and the capability to present high concentration odors with adjustable intensity of the proposed olfactory display were confirmed.
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    4-ary Odor-Shift Keying Using Multi-channel Olfactory Display
    (2019-10-01)
    Wisayataksin, Sumek
    ;
    Angkasuwan, Panupong
    ;
    Ariyakul, Yossiri
    Odor-shift keying, a data modulation technique that encodes digital data by varying odor presentation, was proposed in this paper. A multi-channel olfactory display was used as modulator to release multiple odors whose blending ratio representing different digital data. On the demodulator side, an odor sensing system is used to measure the released smells, revert them into electrical form which is then decoded into the original data by using digital signal processing. The proposed technique can enhance data transfer rate of the communication through odor as carrier. A preliminary experiment was conducted to validate the possibility of the concept of varying the presented odors to represent different binary data. Finally, a string was practically modulated and transmitted by using the proposed technique. The demodulation process can be performed successfully and the data transfer rate was doubled from the previous work.